diff --git a/tests/rules/test_pyenv_no_such_command.py b/tests/rules/test_pyenv_no_such_command.py
index 8d73a5ca..298620f7 100644
--- a/tests/rules/test_pyenv_no_such_command.py
+++ b/tests/rules/test_pyenv_no_such_command.py
@@ -9,6 +9,21 @@ def output(pyenv_cmd):
     return "pyenv: no such command `{}'".format(pyenv_cmd)
 
 
+@pytest.fixture(autouse=True)
+def Popen(mocker):
+    mock = mocker.patch('thefuck.rules.pyenv_no_such_command.Popen')
+    mock.return_value.stdout.readlines.return_value = (
+        b'--version\nactivate\ncommands\ncompletions\ndeactivate\nexec_\n'
+        b'global\nhelp\nhooks\ninit\ninstall\nlocal\nprefix_\n'
+        b'realpath.dylib\nrehash\nroot\nshell\nshims\nuninstall\nversion_\n'
+        b'version-file\nversion-file-read\nversion-file-write\nversion-name_\n'
+        b'version-origin\nversions\nvirtualenv\nvirtualenv-delete_\n'
+        b'virtualenv-init\nvirtualenv-prefix\nvirtualenvs_\n'
+        b'virtualenvwrapper\nvirtualenvwrapper_lazy\nwhence\nwhich_\n'
+    ).split()
+    return mock
+
+
 @pytest.mark.parametrize('script, pyenv_cmd', [
     ('pyenv globe', 'globe'),
     ('pyenv intall 3.8.0', 'intall'),